Debugging ShellΒΆ

The system provides a serial debugging shell on the RX/TX pins in the debugging connector. The serial configuration is 8N1 at 115200 baud, and the console requires an Enter key press to be activated.

For Linux systems, Satlab recommends the tio serial terminal application (https://tio.github.io/) but other applications such as minicom should also work. When using the Satlab JTAG/serial adapter, the debug shell is typically available on /dev/serial/by-id/usb-FTDI_Dual_RS232-if01-port0.

A number of timestamped log messages are printed during boot from various logging groups. Additional logging can be enabled at runtime using the trace commands. The help command can be used to list available commands and their usage. The installed software version and build information is also printed in the debugging shell during boot.

satlab@satlab:~$ tio -b 115200 /dev/serial/by-id/usb-FTDI_Dual_RS232-if01-port0
[tio 09:49:45] tio v1.32
[tio 09:49:45] Press ctrl-t q to quit
[tio 09:49:45] Connected
[srs-4] reboot

[    0.010020] system: Copyright (c) 2020 Satlab A/S <satlab@satlab.com>
[    0.010128] system: boot: 1 reset cause: power-on reset
[    0.010241] system: board serial #31123456
[    0.017846] prop: using stored cal properties

Satlab SRS-4 v1.3.0

[srs-4] help
Available commands:
boot            Bootloader commands
csp             CSP commands
help            Show available commands
history         Show previous commands
prop            System configuration properties
reboot          Reboot system
time            Time command execution
tm              Telemetry commands
trace           Trace subcommands
uptime          Show system uptime
watch           Run command periodically

To show current telemetry values, run the tm show command. The watch command can be used to periodically run a command, with the -b switch enabling screen blanking between updates. Press any key to stop the loop:

[srs-4] watch -b tm show
Running command 'tm show' every 1000 ms
Power Rails
VIN            5977 mV    252 mA   1510 mW
3V3            3370 mV    422 mA   1422 mW
1V8            1807 mV    283 mA    513 mW
1V0             966 mV    335 mA    324 mW
PA                0 mV      0 mA      0 mW

Temperature Sensors
PSU           26.68 C
MCU           29.31 C
FPGA          33.93 C
XCVR          28.93 C
LNA           28.93 C
PA            27.12 C
Interrupted

Dynamic debugging messages can be enabled through the trace command group. This can for example be used to log all received and transmitted CSP messages. To do so, run trace mask csp all:

[srs-4] trace mask csp all
[  288.254384] csp: INP: S 1, D 24, Dp 1, Sp 61, Pr 2, Fl 0x00, Sz 1 VIA: KISS
[  288.254507] csp: SERVICE: Ping received
[  288.254587] csp: OUT: S 24, D 1, Dp 61, Sp 1, Pr 2, Fl 0x00, Sz 1 VIA: KISS